Com bin ati on-ruler



(No Model.)

J. S. LOWE 8u J. H. LEITER.

Combination Ruler'.

Patented Oct. 5i, 1880.

WITNESSES Y VENOR# /n DTD-LITHQGRAPHER. WASHINGTON. u C.

UNtTnn STATES 'PATENT Ormea,

JACOB S. LOI/VE AND JOHN H. LEITER, OF SHELBY, OHIO.

COMBINATION-RULER.

SPECIFICATION lforming part of Letters Patent No. 232,988. dated October 5, 1880.

Application filed June 1G, 1880.

To alt whom it may concern:

Be it known that we, JACOB S. LOWE and JOHN H. LEITER, of Shelby, in the county of Richland and State of Ohio, have invented a newandImprovedOombination-Ruler,ofwhich the following is a specification.

The object ot' this invention is to provide an improved device for facilitating; mechanical drawing.

The invention is especially designed for schools, and is also useful to the mechanical drat'tsman and others; and it consists ot" a series oi' rulers having uniform scales of inches and fractions ot' inches adjustably suspended on a horizontal rod, which is tixed in a headboard on the top otl a blackboard or on a desk, said rulers being arranged in such a manner that by means ot' them geometrically-correct drawings ot' all kinds can be made.

Figure l is a t'ront elevation of the device. Fig. 2 is an elevation ot' a ring used in the device, with a portion broken away to exhibit other parts.

Similar letters of reference indicate correspondin g parts.

In the drawings, A represents the headboard, upper edge of a blackboard, or top of a desk. B is a metallic rod, bent at right angles atthe ends, and driven into the desk, blackboard, or head-board A, so that ample room shallbe left between said board or desk A and the rod B for the free movement of the rings c c along said rod B, while beneath the rod B, on the boardor desk A, a scale of inches and fractions of an inch is marked, as shown at A.

The attachment D consists of a piece of webbing or other tlexible material, a, fastened, by means of glue, rivets, or other convenient device, to one end of the ruler'b, while through the double strengthened end of said tip a is fastened a ring, c, that slides on the horizontal rod B, said ring c being constructed of metal covered with cloth, leather, or other substance that permits said ring cto move noiselessly along the rod B.

The object ot the iiexible tip a is to permit the ready adjustment of the ruler b and its attached ruler d to a slate, copy-book, or sheet of paper.

The rulerb is longitudinally slotted, as shown (No model.)

at f, and in said slot fthe ruler d is movably secured by means of the pin or set-'screw g, so that said ruler d can be fixed at any desired angle relative to the ruler b, and so that said device D may be moved in either direction across the face of the desk, board, book, or slate.

rI'he attachment E resembles the attachment D in the respect that the ruler lt is the same as the ruler b,- but the adjustable ruler k is slotted, as shown at k', and secured in the slot of the ruler h by the thumb-screw l, so that the two rulers h 7c together form a compound slotted ruler, adjustable at any angle, the thumb-screw l serving to hold the ruler k in any relative position wit-l1 the ruler h. In the attachmentv E the ring c encircles the rod B, and the ring n connects the ruler g, by means of the flexible tip 0, to the said ring c', so that the said attachment E has a maximum freedom of movement.

Another attachment, F, is shown, in which the single ruler p is secured and restrained in a vertical position on the rod B by means ot' a screw-eye,

All the rulers herein shown have uniform scales or graduations of inches upon them; hence all lines, angles, and drawings made by means ot' them are exact.

The head-board Ais ot' especial Lise on signpainters7 and designers tables for laying out letters, scrolls, and ornaments with the attachments 5 but said head-board A, as a separate board, is ordinarily omitted on sehool-desks and blackboards, the rod B and its attachments D E F being secured directly upon said desk or blackboard, (represented by the board A,) and the scale A being marked on said blackboard or desk,just in front ot' the rod B.

For a blackboard, desk, or table a strip of paper with a scale ot' inches printed thereon can be pasted or glued to the edge just below the rod B, instead of the printed scale on the head-board A 5 and a ring on the rod B, having a string attached, may be used to slip along said rod B to assistin drawinghorizontal lines, circles, 85e.

Having thus described our invention, we claim as new and desire to secure by Letters Patent V 1. In a ruler, the combination of the graduated board A, having rod B and the attzieh- With jche rod B and scale A', of Jche slotted ments D E, connected therewith by the fiexiruler h, provided with iiexible tip o and rings bie pieces a, and slide-rings o, as shown and c n, and slotted ruler 7c, provided with thumbdeseribed. screw Z, substantially ns herein shown and de- 5 2. In a combination-ruler, the combination, scribed.

with the rod B and scale A', of the slotted JACOB S. LOWE. ruler b, provided with iiexible tip a I.1nd ring` JOHN H. LEITER. c, and ruler d, provided with set-screw or pin Witnesses: g, substantially as herein shown and described. F. DENNIS, `1o 3. In a combination-ruler, the Combination, O. L. KEER. 

